721646063605041 has 8 divisors (see below), whose sum is σ = 963650416758144. Its totient is φ = 480369543094320.

The previous prime is 721646063605039. The next prime is 721646063605109. The reversal of 721646063605041 is 140506360646127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 721646063605041 - 2¹ = 721646063605039 is a prime.

It is a super-2 number, since 2×721646063605041² (a number of 31 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (721646063605741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181958158281 + ... + 181958162246.

It is an arithmetic number, because the mean of its divisors is an integer number (120456302094768).

Almost surely, 2^{721646063605041} is an apocalyptic number.

It is an amenable number.

721646063605041 is a deficient number, since it is larger than the sum of its proper divisors (242004353153103).

721646063605041 is a wasteful number, since it uses less digits than its factorization.

721646063605041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363916321191.

The product of its (nonzero) digits is 4354560, while the sum is 51.

The spelling of 721646063605041 in words is "seven hundred twenty-one trillion, six hundred forty-six billion, sixty-three million, six hundred five thousand, forty-one".